All information obtained as a result of the study will be regarded confidential until appropriate analysis and review is performed. The results will be published and presented internationally. As far authorship and contribution, the investigators will follow the recommendations from the International Committee of Medical Journal Editor (ICMJE)(www.ICMJE.org). After publication of the initial report, participating investigators may prepare and publish sub analysis. All sub studies must be approved by the steering committee. All participant investigators will be acknowledged by name in the main publication.The recommendations of the STROBE group will be followed all the way (7).